Asked if the show could ever abandon Wales entirely, Davies told SFX: "I would never want to. Whether I do any more [seasons of Torchwood] I don't know, because I think I've saved the world often enough... but it's a BBC Wales production as well, [so] it's part of its DNA."

He added that the show's Welsh setting will always serve as the "building blocks" of the series.

"I would think if there was a new series you'd start with something being dug up here [in Wales]," he speculated. "Something mysterious. Those are the building blocks, it would always work."